Police seized more than 4kg of the drug ketamine after stopping a man as he left a Tai Po flat, a court heard yesterday. It was alleged that the discovery of 4.8kg of a mixture containing just over 4kg of ketamine was made inside a flat to which Sidney Ho Man-wai - who has pleaded not guilty in the Court of First Instance to two counts of drug trafficking - had a key. Ho, who was stopped after police put the flat under surveillance, was also alleged to be in possession of a plastic bag containing 10.3g of ketamine at the time of his arrest. The court heard that police saw Ho arrive at the flat in a Mercedes car on July 25 last year. He allegedly spent about 11/2 hours in the flat before being confronted by police as he left. After drugs were discovered on his person, he allegedly told police they were for his own personal use. Police also discovered a key, which they then used to gain entry to the house. Inside they found the 4kg of ketamine - said to be worth about $800,000 - scales and plastic bags. It was alleged that although Ho was not associated with the actual premises, services connected to the flat were in his name. The trial continues today before Judge Esther Toh Lye-ping.